How does social media influence celebrity empowerment

i have chosen interview a my main source of research i need that to be favoured, however i need a good comaprison between interview and focus group.my main essay topic how social media influences celebrity empowerment, therefore i need a balanced discussion on these sources of research. i need a clear argument on why interviews are a better way of researching my specific topic. my interviews were taken out on both women and men aged 16-25